Vassal - landholder for a local lord or lady, to whom you pay homage and swear fealty.
Bailiff - manager of a manor estate.
Serf - peasant working the land of a lord or lady, paying dues upon demand.
Cottager - low class peasant with a cottage, but no land.
Servant - house peasants working in the manor of a great lord or lady.
Yeoman - land owner, independent farmer. Required to maintain arms and training in swords, daggers, and the longbow.
Armorer - built armor
Apothecary - dispensed remedies made from herbs, plants and roots
Artist - employed by a noble
Astrologer - student of stars and planets
Atilliator - made crossbows
Baker - baked bread
Barber - cut hair, dentist, surgeon, blood-letter
Blacksmith -forged weapons, sharpened weapons, repaired armor
Bottler - stored and dispensed wines and other expensive provisions
Butler - responsible for the castle cellar and beer.
Bower or bowyer - manufactured bows, arrows and crossbows
Candlemaker - made candles
Carpenter -  built furniture, roofing, siege engines and wood paneling.
Castellan - appointed as custodian of a castle
Chamberlain - responsible for the chamber, including the administration of the household budget, and collect revenues and paying expenses
Chancellor - a secretary to a noble or royal person
Clerk - accountant
Clothier - made clothes for nobles, and had knowledge of various fine and expensive materials
Constable - police officer
Cook - roasted, broiled, and baked food 
Cordwainer - a shoemaker or cobbler, a craftsman who made shoes
Cottar - lowest peasant occupations, undertaken by the old or infirm, with jobs including swine-herd, prison guard, and other menial tasks
Ditcher - dug castle moats and foundations
Ewerer - brought and heated water for the nobles
Fletcher - crafted and manufactured bows and the flights of arrows
Gardener - medieval gardener needed a knowledge of herbs and plants, but also had to dig defensive ditches around a castle
Herald or harker - declared announcements on behalf of the king or noble to the public.
Herbalist - planted and maintained medicinal plants, roots, and herbs
Porter - responsible for the main castle entrance and for the guardrooms, and ensured that no one entered or left the castle without permission.
Jester - entertained the court
Keeper of the wardrobe - managed the dressing room and storage room for clothes used by a noble in a castle or manor. Also in charge of tailors and a laundress.
Tailor - mended clothes.
Laundress - washed clothes.
Marshal - in charge of a household's horses, carts, wagons, containers, and the transporting of goods.
Messenger - lesser diplomats of a lord or lady who carried receipts, letters, and commodities.
Minstrel - entertained by singing and playing musical instruments. Recorded the deeds of heroic knights in songs giving the knight great publicity and establishing respect and additional status.
Moneylender - bankers
Page - waited tables, cared for the clothes of a lord or lady and assisted them in dressing.
Painter - painted buildings.
Physicians - bleeding, lancing and surgery.
Potter - craftsmen of clay, porcelain, and ceramics for cooking and storage. May also have worked as sculptors. member of a craft guild.
Reeve - supervised all work on a lord's property, and ensuring that everyone began and stopped work on time.
Scribe - reading, writing, and comprehension skills.
Scullion - the lowest of kitchen workers. Duties included washing and cleaning the kitchen.
Sheriff - police chief.
Spinster - spins yarn.
Seneschal - manager of a great hall.
Squire - junior to a knight. Learnt the code of chivalry, heraldry, horsemanship, and the use of weapons. Also learnt about high society, courtly etiquette, music, dancing. 
Watchman - responsible for security at a castle or manor.
